Action and use of circuit components (4.3.3) | Cambridge IGCSE (9–1) Physics 0972 (Extended) (2026–2028) | KnowledgeSet

Action and use of circuit components

Physics · IGCSE · Cambridge · Cambridge IGCSE (9–1) Physics 0972 (Extended) (2026–2028) · Specification point · 4.3.3 · Electricity and magnetism · Electric circuits

Potential difference and resistance at constant current

Potential dividers

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Learning Objectives

4.3.3 Action and use of circuit components

Core	Supplement
$1 Know that the p.d. across an electrical conductor increases as its resistance increases for a constant current$	$\frac{R_{1}}{R_{2}} = \frac{V_{1}}{V_{2}}$